About the Authors

Min Chen

Affiliation Center for AIDS/STD Control and Prevention, Yunnan Center for Disease Control and Prevention, Kunming, Yunnan, China

Li Yang

Affiliation Center for AIDS/STD Control and Prevention, Yunnan Center for Disease Control and Prevention, Kunming, Yunnan, China

Yanling Ma

Affiliation Center for AIDS/STD Control and Prevention, Yunnan Center for Disease Control and Prevention, Kunming, Yunnan, China

Yingzhen Su

Affiliation Center for AIDS/STD Control and Prevention, Yunnan Center for Disease Control and Prevention, Kunming, Yunnan, China

Chaojun Yang

Affiliation Center for AIDS/STD Control and Prevention, Yunnan Center for Disease Control and Prevention, Kunming, Yunnan, China

Hongbing Luo

Affiliation Center for AIDS/STD Control and Prevention, Yunnan Center for Disease Control and Prevention, Kunming, Yunnan, China

Huichao Chen

Affiliation Center for AIDS/STD Control and Prevention, Yunnan Center for Disease Control and Prevention, Kunming, Yunnan, China

Ling Chen

Affiliation Center for AIDS/STD Control and Prevention, Yunnan Center for Disease Control and Prevention, Kunming, Yunnan, China

Wenyun Yan

Affiliation Center for AIDS/STD Control and Prevention, Yunnan Center for Disease Control and Prevention, Kunming, Yunnan, China

Yuhua Shi

Affiliation Center for AIDS/STD Control and Prevention, Yunnan Center for Disease Control and Prevention, Kunming, Yunnan, China

Manhong Jia

jmanhong@yahoo.com.cn (MJ); lulin@yncdc.cn (LL)

Affiliation Center for AIDS/STD Control and Prevention, Yunnan Center for Disease Control and Prevention, Kunming, Yunnan, China

Lin Lu

jmanhong@yahoo.com.cn (MJ); lulin@yncdc.cn (LL)

Affiliations Center for AIDS/STD Control and Prevention, Yunnan Center for Disease Control and Prevention, Kunming, Yunnan, China, College of Public Health, Kunming Medical University, Kunming, Yunnan, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Interpretation of results: MC YM HL MJ LL. Critically revised manuscript: YM MJ. Conceived and designed the experiments: MC YM MJ LL. Performed the experiments: MC LY YZS CY HC LC WY YHS. Analyzed the data: MC YM LY. Wrote the paper: MC.